2017年10月6日SAT官方每日一题---数学选择.

　　下面是2012年10月6日的SAT官方每日一题的内容，是关于数学方面的，题型是选择。SAT官方每日一题是collegeboard每天都会发布的题目，关于SAT考试的三个部分的各个题型。下面我们就一起来看一下这个SAT官方每日一题吧。

　　SAT官方每日一题之数学---选择：

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　　Mathematics > Standard Multiple Choice

　　Read the following SAT test question and then click on a button to select your answer.

　　On the line above, if, which of the following must be true?

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　The correct answer is B

　　Explanation

　　You can rewriteas,as,as, andas, and then consider the five answer choices.

　　The first answer choice is equivalent tois less than. You know thatis less thanand thatis also less than, but the sum ofandmight not be less than. Since the question asks which statement must be true, the first answer choice is not the correct answer.

　　The second answer choice is equivalent tois less than. This statement must be true, becauseis less thanandis less than. Although there is no need to consider the other answer choices once you see that the second answer choice must be true, each of the remaining choices could be rewritten in the same way and you could see that they need not be true.

　　下面为大家提供一些和这些SAT官方每日一题相似的题目，供大家练习：

　　In triangle , the length of side is and the length of side is . Which of the following could be the length of side ?

　　Answer Choices

　　(A)

　　(B)

　　(C)

　　(D)

　　(E)

　　The correct answer is D

　　Explanation

　　By the Triangle Inequality, the sum of the lengths of any two sides of a triangle must be greater than the length of the remaining side. Therore, , or . Thus, , which eliminates options (A), (B), and (C). Also by the Triangle Inequality, , or , which eliminates choice (E). Therore, of the given choices, only choice (D), , could be the length of side.

　　以上就是关于2012年10月6日SAT官方每日一题中数学部分的详细内容，包括了题目和选项以及答案，后面附有一道相关的练习题。大家可以在备考SAT的过程中关注SAT每日一题的内容，这样就可以更好有不间断的练习，也就能在日积月累的过程中得到提高。